From the source[1]: The Raspberry Pi had to pass radiated and conducted emissions and immunity tests in a variety of configurations (a single run can take hour

From the source[1]: The Raspberry Pi had to pass radiated and conducted emissions and immunity tests in a variety of configurations (a single run can take hours), and was subjected to electrostatic discharge (ESD) testing to establish its robustness to being rubbed on a cat. It’s a long process, involving a scary padded room full of blue cones, turntables that rise and fall on demand, and a thing that looks a lot like a television aerial crossed with Cthulhu. As someone who's looked into getting a substantially similar device CE-marked, getting it all done inside a week is pretty heroic. [1] http://www.raspberrypi.org/archives/978 http://www.raspberrypi.org/archives/978